US4140836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous acrylic-carboxylated polyether coating compositions
Assignee: PPG Industries Inc
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Filing: 1978-03-07
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Granted: 1979-02-20
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Expires: 1998-03-07
Abstract
Abstract An aqueous composition useful for forming primer coatings for adhering high molecular weight emulsion polymerized acrylic polymers to metallic substrates is disclosed. The aqueous dispersion comprises a mixture of:
Inventors
- 👤 David R. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/625; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A method of producing a multiple layer coating on a substrate comprising: (A) depositing on a substrate a film of a primer formed from an aqueous composition comprising a mixture of: (1) a water-borne acrylic polymer latex in which the acrylic polymer has a molecular weight of at least 250,000 on a weight average basis and which is composed of 35 to 100 percent by weight of esters or organic acids having terminal methylene groups, 0 to 10 percent by weight of unsaturated carboxylic acids and 0 to 60 percent by weight of a copolymerizable monomer containing a CH 2 =C group in the terminal position other than the acids and esters mentioned above, the percentage by weight being based on total weight of the monomer charge; (2) a carboxylated polyether formed from reacting and then hydrolyzing: (a) a polyepoxide having an epoxide equivalency greater than 1.0, (b) a compound containing at least one phenolic hydroxyl group and containing at least one group hydrolyzable to a carboxyl group; (B) drying said primer film; (C) applying over said primer a superimposed topcoat composition.
Claim 2
Independent Claim
182 words
A method of producing a multiple layer coating on a substrate comprising: (A) depositing on a substrate a film of a primer formed from an aqueous composition comprising a mixture of: (1) a water-borne acrylic polymer latex in which the acrylic polymer has a molecular weight of at least 250,000 on a weight average basis and which is composed of 35 to 100 percent by weight of esters or organic acids having terminal methylene groups, 0 to 10 percent by weight of unsaturated carboxylic acids and 0 to 60 percent by weight of a copolymerizable monomer containing a CH 2 =C group in the terminal position other than the acids and esters mentioned above, the percentage by weight being based on total weight of the monomer charge; (2) a carboxylated polyether formed from reacting and then hydrolyzing: (a) a polyepoxide having an epoxide equivalency greater than 1.0, (b) a compound containing at least one phenolic hydroxyl group and containing at least one group hydrolyzable to a carboxyl group; (B) drying said primer film; (C) applying over said primer a superimposed topcoat composition.
Claim 3
Dependent Claim
16 words
The method of claim 1 in which the topcoat is a high molecular weight acrylic polymer.
Claim 4
Dependent Claim
11 words
The method of claim 2 in which the substrate is metal.
Claim 5
Dependent Claim
12 words
The method of claim 3 in which the metal is galvanized steel.
Claim 6
Dependent Claim
22 words
The method of claim 2 in which the primer film is dried by baking at a temperature of 150° to 450° C.
Claim 7
Dependent Claim
10 words
The coated article produced by the method of claim 2.
Claim 8
Dependent Claim
10 words
The coated article produced by the method of claim 4.
References Cited (Backward Citations)
US3403088A
Cited
US3960795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |